Up-to-date defibrillation recommendations based on continuous ecg analysis during cardiopulmonary resuscitation

An external defibrillator, comprising:

• a detection circuit configured to detect an electrocardiogram (ECG) of an individual receiving chest compressions during a cardiopulmonary resuscitation (CPR) period;
• a display configured to output a recommendation indicating whether to administer a defibrillation shock to the individual and a certainty of the recommendation;
• an input device configured to receive an input signal;
• a discharge circuit configured to output a defibrillation shock to the individual;
• a processor;
• and
• memory storing instructions that, when executed by the processor, cause the processor to perform operations comprising:
• identifying multiple segments of the ECG, start times of the multiple segments being separated by a predetermined period;
• generating multiple shock decisions by determining whether the multiple segments comprise a shockable rhythm, the multiple shock decisions respectively corresponding to the multiple segments;
• updating the recommendation by analyzing the multiple shock decisions;
• determining certainties of the multiple shock decisions by determining likelihoods that the multiple segments comprise the shockable rhythm;
• updating the recommendation by analyzing the certainties;
• and
• in response to the input signal, causing the discharge circuit to output the defibrillation shock to the individual after the CPR period.

A medical device, comprising:

• a detection circuit configured to detect an ECG of an individual receiving chest compressions;
• an output device configured to output a recommendation indicating whether to administer a defibrillation shock to the individual;
• a processor;
• and
• memory storing instructions that, when executed by the processor, cause the processor to perform operations comprising:
• identifying a first segment of the ECG that corresponds to a first time period;
• generating a first shock decision by determining whether the first segment of the ECG comprises a shockable rhythm;
• generating the recommendation by analyzing the first shock decision;
• identifying a second segment of the ECG that corresponds to a second time period, a start time of the second time period occurring after a start time of the first time period;
• generating a second shock decision by determining whether the second segment of the ECG comprises the shockable rhythm;
• and
• updating the recommendation by analyzing the second shock decision.

A method performed by a medical device, the method comprising:

• detecting an ECG of an individual receiving chest compressions;
• identifying a first segment of the ECG that corresponds to a first time period;
• generating a first shock decision by determining whether the first segment of the ECG comprises a shockable rhythm;
• generating a recommendation by analyzing the first shock decision;
• outputting the recommendation;
• identifying a second segment of the ECG that corresponds to a second time period, a start time of the second time period occurring after a start time of the first time period;
• generating a second shock decision by determining whether the second segment of the ECG comprises the shockable rhythm;
• updating the recommendation by analyzing the second shock decision;
• and
• outputting the updated recommendation.